Do guys take girls picture without them knowing?

I was talking to this guy he then walked away and I heard that camera iPhone sound that they make. I quickly looked and his phone was in his hand and his hand way to the side. Am I just being paranoid? Do guys do this?

I caught a guy doing that when he was talking to me. He tried to be sneaky about it. What was the point in doing that?

Many do, but most of the time the reasoning is based off of many different scenarios.

Sometimes.

Sometimes, depends how much they are into her.

Never